Clutch.



No. 742,816 `PA'].`E1\ITEID OCT. 27, 1903.

P,.B.VARNEY.

GLUTGH..

A.PPLIOTIONFILE'D MAR. 2. 1903.

. No MODEL.' asumasum1 Q n; u

D v QR b. be

A I en Pncauw.. WASHINGTON u l:

om 0 9 l 71A 2 mL C v0 D E T N E T A P P.B..VARNEY.

CLUTCH. APPLICATION FILED MAB.. Z, 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

ivo.' 742,816.,

PERCY EYECIFIGATION forming part of Letters Patent No. 742,816, datedApplication filed March Z,

t may concern that l, FERCY E.

To all whom Be it known citizen of the the following is a specification.

an improved ple in construction Fig. 2

view showing method of their support.

vation, partly in section, form of my improved clutch. lelevation of aportion of the o Fig. a, illustrating the detail the same; and F' insection, showing anism for of action.

COD

which in the forms of the Figs. l, 2, and 6 is hollow,

may be slightly modified, so

4o solid. ln the present instance th stitutes one mem ley B, made withto be freely of said shaft, said clutch. Keyed or forms the secondotherwise dially-projecting arms a'--in the stance two-on each of whichis carried a slid 5o a2., so constructed as to be free to i upon towardor in turn having pivotally United States, and a resident of HaddonHeights, New Jersey, have invented certainlmprovements in Clutches, ofwhich The object of this invention is device by which a driving and adriven member may be operatively connected io at will, itbein gespecially desired that such device while being certain in its actionand simshall at the same time require but a minimum of power for itsapplil attain as herereference being which Figure l is a side elevationof my improved and the supporting-shaft is a vertical of the clutch,taken on Fig. 3 is a side elevation of fixed to and projecting fromshaft upon which the device is supported, the

the grippingshoes anc Fig. 4f is a side eleshowing a special Fig. 5 is aside clutch shown in elevation, partly a special form of throwing theclutch into and out In the above drawings, A represents a shaft deviceshown in though, fo th, the mechanism of ber of the clutch,

a removable cover rotatable upon and independ fixed to the shaft A is acollar a, having any desired number of rashaft A, each slide fixed to ita swing- Fatented October 27,

UNITED STATES Y PATENT QEEICE.`

E. VARNEY, OF HADDON HElGHTS, NEW JERSEY.

CLUTCH;

october 27,1903.

1993. Serial Nn. 1451710. (No model.)

ing shoecarrying arm d4 by means of a pin a3 through a portion of theslide a2 distant from said shaft A. Figs. 2 and 3 it will be seen thatthis arm a4 is U-shaped and may be described as carrying on the insideof each of its arms a grippingshoe a5, these shoes being held inposition, so as to move independently of their supporting-arm a4, bymeans of pivots a6. The adjacent faces of each of these shoes are formedon circular arcs concentric with the shaft A and may be made of suchdimensions as are required by the power to be transmitted. The interiorof the pulley B, which in the present instance forms a casing, isprovided with an inwardlyprojecting iiange or rib b',also concentricwith the shaft A and having its inner and outer faces formed to coactwith the grippingshoes a5.

The collar d is slotted circumferentially at points adjacent to each ofthe slice-carrying arms a, which are provided with extended portions al,entering said slots and to some extent coacting with the sides of thesame to relieve the strain on the pivot d3 when the shoes grip theflange b. ln the forms of my device shown in Figs. l to 3, inclusive,these extensions a7 are of a beveled or triangulaiform, and there is anopening through the collar a through the wall of the shaft A and VAENEY,a

to provide had to the casing havthe line one the l the struction ofbeveled section c upon an operating-piece C,

mechas hereinthe device that it may be rigidly xed to an operating-rod cand care shaft conried in the hollow of the shaft A. The piece and apul- G has cylindrical sections c2 and c3 of different diameters unitedby the beveled surface c, s abut upon these and the piece or pieces ctparts without revolution, or they may be so arranged as to turnindependently of the shaft A.

Each slide a2 is preferably provided with a lug a, through which extendsa headed bolt D, threaded into the collar d and provided with a jam-nutd, whereby it may be retained in any desired position.

b, so as ent member of present ine move thereas it is desiredthat lnoperation as long opening into its interior through which oper-v themember A shall turn independently of inner shoe d5 causes it to approachthe outer the member B the operating-rod c is held shoe, which has beensimilarly turned on its in such position that the cylindrical portionpivot, though to va less extent, with the result 7o c3 of the block orpiece C keeps the radiallythat both shoes. grip their respectivecoacting 5 movable piece as in its extreme outward posurface of the ribZi and pull the slide a2 insition. By reference to Fig. 3 it will beseen wardly on the arin a. By this means the two that when so held theV-shaped recess in the members of the clutch will be operatively end ofsaid section engages the triangular coupled and will remain so until bythe suit-y 75 i projection a7 on the swinging arm a4 and by ablemovement of the rod c' the beveled porvii tue of the arrangement of saidparts holds tion of the rod C is brought against the inner l its pieceso that the pivots d of the shoes a5 end of the bolt as, so as to forceit outwardly the shaft A with the pivot a3. It will be unvone side ofthe projection a7. As said bolt 8o i 5 the collar a the arm a with allthe parts carried thereby are also rotating and that the tendency of theslide a2 is to move away from the center of the shaft under the actionof centrifugal force. Since the swinging arin zo a" is held to saidslide by its pivot a3, so that its center of gravity is between saidpivot and the shaft A, it will be seen that except when said center ofgravity is in the radial line joining this pivot and the center of saidshaftv 2 5 said arm a4, with its shoes, tends also under center of theshaft A, which movement of 85 t e two members of the clutch, Thisaction,in addition, permits outward motion of the slide a2 with its parts as awhole upon the 9o arm al, and its motion is limited bythe head of thebolt D striking the lug a, said bolt being given a permanent adjustmentwhen the parts of the clutch are originally assembled. 95 If desired,the swinging of the shoe-carrying arm a4 and the consequent connectingor pivot a3 in an endeavor to move away from the shaft A. It will beunderstood, further, that this action is resisted by the rod or bolt 3oas, so that when it is desired to operatively that is necessary for thispurpose is to move may be accomplished y means other than therod e sothat the portion c2 is in line with the longitudinally-movable rod c andblock ioo C within the hollow shaft, for, as shown in Figs. e and 5, Imay, if desired, provide alongitudinally-movable collar E, looselycarried on the shaft A and having a portion projecting into the interiorof the casing formed by io5 the member B. his collar has a projectinglug c within said casing, in which is formed a recess or notch for thereception of a pin or projection d10 from the inner end of the swingingarm'cv. The outer face of the collar E is i i 3 5 tion a7, which, itwill be understood, is pressas, will force said section inwardly,thereby 4o of the relative placing of the flange b and of 45 ,arm andits attached parts remaiiisiii unstable e', and there .is a secondcollar F, carried b the shaft and provided with a V-shaped recess forthe reception of said projection, this latter collar, however, beingsplined to the ii 5 shaft A', so as to be free to move longitudinallyand being provided with an angular groove for the reception of anydesired device whereby it may be operated. There is a cerfrom the pivotand to the relatively great tain amount of lost motion between theprorzc .s force exerted on said lever-arm due to the jection am from theswinging' arm d and the 55 arrangement above noted said shoes griprecess in the luge, and the various parts of and hold the two inem bersof the clutch tothe device are so arranged that as long as the flange bas long as the piece as is in action.

5o greater or less extent on the pivot a3 and than has hitherto beenpossible. Such action larE will have the end of its projection e r9.5immediately moves the center of support of displaced to one side ortlieother of the end e the inner shoe a5 farther from the center of or apexof the triangular recess of the collar the shaft A, with the result thatthe curved F. In order, therefore, to disengage the two surface of thisshoe comes in contact with members of the clutch from each other, thethe inner surface of the flange or rib b and said latter collar is movedlongitudinallyon :5c being curved on the same radius as this lattheshaft and the sides of this recess made to ter is immediately turned onits pivot a6, so engage the sides of the projection e', thereby thatsaid curve is still concentric with the turning the collar E relativelyto the shaft to center of the shaft. Such turningof this an ext a4 withthe gripping-shoes, so that the pivots of said shoes are, as before, ona radial line from the center line of the shaft A.

A further modification of the operating mechanism is shown in Fig. 6,where, as in Figs. l and 2, a hollow shaft A is used with a longitudinally-movable block and an operating-rod c to force outwardly apiece This latter is attached to one end of a lever g, pivotallysupported at g on a lug from the collar a, and, as in the formerinstance, motion of this lever is made to forcibly turn the swinging armcv* on its pivot a3, so as to move the shoes a5 out of engagement withthe flange b', or, on the other hand, to permit said shoes to grip saidfl( nge when the rod c' is properly moved, so as to allow the piece G tobe moved inwardly under the action of the centrifugal force acting onthe arm CL4 and its shoes. If desired, a lug a may be provided on thesupporting-arm a', so as to prevent movement of the lever g to the wrongside of the radial line after the piece G has been moved, so as to causethe shoes to disengage the dan ge, it being understood that suchprovision makes it necessary that the arm a4 should move in thedirection of the arrow in Fig. G in order to permit the shoes to grip.

l claim as my inventionl. The combination in a clutch, of a driving anda driven member, an arm pivotally supported upon one member, meanscarried by said arm for gripping a suitable portion of the other member,the point of support of said arm being so placed that it is farther fromthe center of revolution of the clutch than is the portion of the othermember to be gripped, with means for holding said arm in a position suchthat one member of the clutch may turn independently of the other,substantially as described.

2. In a clutch, the combination of a driving and a driven member, apiece operatively connected to one of said members and supported so asto be free to move bodil 7 toward and from the center of revolution ofthe clutch, an arm pivoted to said piece having means for gripping asuitable portion of the second member of the clutch, and means wherebysaid arm may be retained in a position such that the two members of theclutch are free to turn independently of each other, substantially asdescribed.

Thecombination in a clutch, of a driving and a driven member, an armfixed to one member, a piece supported thereby so as to be free to movebodily toward and from the center of revolution of the clutch, an armpivoted to said movable piece, shoes carried by said pivoted armconstructed to grip a suitable portion of the other member of theclutch, and operating means constructed to hold said arm in a positionsuch that the shoes carried thereby do not grip said second member,substantially as described.

el. The combinationin a clutch, of tWo menibers, a rib on one of saidmembers, an arm pivoted to the other member at a point farther from thecenter of revolution of the clutch than said rib, shoes pivotallysupported on said arm for gripping the rib, holding the arm in adefinite position when it is desired to turn one member of the clutchindependently of the other, substantially as described.

5. The combination in a clutch, of adriving and a driven member, an armfixed to one member having a piece movable bodily toward and from thecenter of revolution of the clutch, an arm pivoted to said movable pieceat a point relatively distant from the center of revolution of theclutch, shoes pivoted to said arm and placed to engage a suitablegripping-surface on the second member .of the clutch, with means forswinging said arm on its pivot and thereby causing said shoes to releasesaid second member, substantially as described.

6. In a clutch, the combination of a driving and a driven member, an armpivotally carried by one member, having a pair of grip,- ping-shoespivoted to it, the second member having a portion extending between saidshoes for engagement thereby, the pivot of the arm being at a greaterdistance from the center of revolution of the clutch than the portion ofthe second member to be gripped, with a device whereby said pivoted armmay be held in a definite position with the shoes out of engagement withthe gripping-surface of the second member, substantially as described.

7 In a clutch the combination of a driving and a driven member, an armXed to one of the members and carrying a piece free to move toward andfrom the center of revolution of the clutch, an arm pivoted to saidmovable piece having means for engaging a suitable portion of the secondmember of the clutch, means for moving said arm on its pivot todisconnect the two members of and means for engaging the arm andindependent of the moving means, for limiting the amount of movement ofthe said arm, substantially as described.

8. The combination in a clutch, of a hollow shaft, an arm fixed thereto,a second arm pivotally supported upon the rst arm having meansconstructed to engage the second member of the clutc and a device in thehollow shaft having means for posit'vely moving said arm so as torelease the clutch members and hold the engaging means out of action,substantially as described.

9. rlhe combination in a clutch, of a driving and a driven member, anarm fixed to one member, a slide movable thereon in a radial line ofsaid clutch, a U-shaped arm pivoted to said slide, shoes pivoted to thesides of said U -shaped arm, a portion of the second member of theclutch extending between said two shoes, a radially-moving piece forengaging said pivoted arm and thereby holding said shoe out ofengagement with the projecting IIO the clutch,

member of the clutch, and means carried by -the shaft for operating saidpiece, substantially as described.

l0. In a clutch, the combination of a shaft, a casing carried therebyhaving' an inwardlyproj eeting Han-ge, an arm keyed to the shaft, onsaid arm, a second arm pivotal connection to said slide at a pointrelatively distant from the center of of shoes carlongitudinally-movablepiece in the shaft for actuating said piece to cause the shoes todisengage the flange, substantially as described.

ll. ln a clutch, the combination of a driving and a driven member, anarm carried on one member having means for gripping a suit able portionof the other member, the of support of said arm being farther from thecenter of revolution of the portion designed for the gripping means, anda device for actuating said gripping means, said device including alongitudinally-movable shaft having a cam-surface with means operativelyconnecting the gripping' means with said surface and operated bymovement thereof for positively moving' said gripping means to releasethe clutch members, substantially as described.

l2. The combination in a clutch having driving a have signed my name tothis speciiication in the presence of 5o two subscribing Witnesses.

PERCY E. VARNEY.

Vitnesses A WILLIAM E. BRADLEY, Jos. l-I. KLEIN.

